How to Put On a Mountain Bike Chain [Without Tools]

Last Updated on August 26, 2025 by Jaxon Mike

As an avid mountain biker, I know firsthand how crucial it is to have a well-maintained and properly installed bike chain. Your chain is the vital link that transfers power from your pedals to the rear wheel, propelling you forward on the trails. A loose, worn, or misaligned chain can not only hamper your bike’s performance but also lead to costly repairs down the line. That’s why it’s essential to learn how to put on a mountain bike chain correctly, even if you don’t have specialized tools on hand.

In this comprehensive guide, I’ll walk you through the step-by-step process of installing a new mountain bike chain without the need for any special tools. Whether you’re a seasoned cyclist or a beginner just starting out, this knowledge will empower you to maintain your bike and keep it running smoothly, no matter where your adventures take you.

Preparing to Install the New Chain

Before we dive into the installation process, there are a few essential things you’ll need to prepare:

• New mountain bike chain: Make sure to purchase a chain that’s compatible with your bike’s drivetrain and number of gears. Consult your bike’s manufacturer or a local bike shop if you’re unsure.
• Chain tool: While not strictly necessary, having a chain tool on hand can make the installation process much easier. If you don’t have one, don’t worry—we’ll cover an alternative method.
• Rag or paper towels: These will come in handy for cleaning your bike’s chain and derailleurs before the new chain goes on.

Removing the Old Chain

The first step in installing a new mountain bike chain is to remove the old one. Start by shifting your bike’s rear derailleur to the smallest cog in the back, which will give you the most chain slack to work with.

Next, use your chain tool to push out the pin that connects the two ends of the chain. If you don’t have a chain tool, you can use a pair of pliers or even a small screwdriver to carefully pry the pin out. Just be gentle to avoid damaging the chain.

Once the pin is removed, you can simply pull the old chain off your bike. Make sure to keep it out of the way, as you’ll need to use it as a guide for the new chain later on.

Preparing the New Chain

Now that the old chain is out of the way, it’s time to get the new one ready for installation. Start by laying the new chain out on a clean, flat surface and using the old chain as a reference to determine the correct length.

Most mountain bike chains come with extra links, so you’ll need to remove any excess links to ensure the new chain fits your bike properly. To do this, simply use your chain tool to push out the necessary pins, removing one link at a time until the chain is the right length.

Once you’ve got the chain at the correct length, it’s time to move on to the installation process.

Installing the New Chain

With the old chain removed and the new one prepared, you’re ready to start the installation. Here’s how to do it:

1. Feed the new chain through the rear derailleur, making sure it’s properly routed and aligned with the pulleys.
2. Continue threading the chain around the cassette (the gears on the rear wheel) and the chainring (the gears at the front).
3. Overlap the two ends of the chain and use your chain tool to push the connecting pin back in, linking the two ends together.
4. If you don’t have a chain tool, you can use a pair of pliers or even your fingers to carefully push the pin back in, but this method requires more effort and dexterity.
5. Once the chain is connected, give it a gentle tug to ensure the link is secure.

Adjusting the Chain Tension

With the new chain installed, the final step is to adjust the tension to ensure smooth, efficient operation. Start by shifting your rear derailleur to the largest cog in the back, which will create the most chain slack.

Next, use your hand to gently pull the derailleur body away from the wheel, taking up any excess chain slack. Once you’ve got the right amount of tension, you can secure the derailleur in place by tightening the adjusting barrel or barrel adjuster.

It’s important to note that the exact tension you need may vary depending on your bike and riding conditions, so you may need to experiment a bit to find the sweet spot.

Conclusion

Putting on a mountain bike chain without tools may seem daunting at first, but with the right knowledge and a little bit of practice, it’s a skill that every cyclist should have in their arsenal. By following the steps outlined in this guide, you’ll be able to keep your bike’s drivetrain in top shape, saving time and money on costly repairs.

Remember, regular maintenance and inspection of your bike’s chain and other components are crucial for ensuring a smooth, safe, and enjoyable ride on the trails. Happy riding!

FAQs

How often should I replace my mountain bike chain?

The frequency of chain replacement depends on several factors, such as your riding frequency, terrain, and maintenance routine. As a general rule of thumb, most mountain bike chains need to be replaced every 1,000 to 3,000 miles, or whenever you notice significant wear and stretch in the links.

Can I reuse the old chain pin when installing a new chain?

It’s generally not recommended to reuse the old chain pin, as it may be worn or damaged, compromising the integrity of the new chain. It’s best to use a new connecting pin or quick link when installing a fresh chain.

What’s the difference between a chain tool and pliers for installing a chain?

A chain tool is specifically designed for pushing out and reinstalling the connecting pins on a bike chain, making the process much easier and more precise. Pliers can be used as an alternative, but they require more force and dexterity, and there’s a higher risk of damaging the chain.

How do I know if my chain is the right length for my bike?

The best way to determine the correct chain length is to use the old chain as a reference. If the new chain is too short, you’ll have difficulty routing it through the derailleur and around the cassette. If it’s too long, you’ll have excessive slack that can cause shifting issues and even damage to your components.

Can I use a chain tool to remove a quick link?

Yes, you can use a chain tool to remove a quick link, which is a convenient way to connect and disconnect a bike chain without having to push out a pin. However, be careful not to overuse the tool, as it can potentially damage the quick link over time.